Attachment for pneumatic tires



Sept. 17, 1929. J. GREEN ATTACHMENT FOR PNEUMATIC TIRES Filed Aug. 6 1925 INVENTOR- @Jn/5 694%7?,

BY W Patented Sept. 17K, 1929 i UNITI-:nSTATES PATENT oFFlcE Application led August 6, 1925. Serial No. 48,668.

This invention relateslto an attachment for Fig. 7 is a section on line -lofFigzl. v pneumatic tires, in the use of which the unc- With particular reference to Figs. l and 2, A ture of the Valve stem and valve stem openwherein the sealing plug is shown as an in-E ing in the tire rim is sealed against the adtegral part of the flap, 1 represents a flap hav- 5 mission of, moisture or deleterious matter, ing a thickened central portion 2 to reinforce 55 with the result that damage to the inner tube the same. The plug of the present invention from such source is entirely avoided. is in this form shown integral with the flap The invention contemplates the provision and comprises what may be termed a lower. of a sealing plug Whichflnay be constructed as portion 4 andan upper portion 4.. The lowi 1o a separate unit or may be made integral with er .portion 4 longitudinally of the flap come0 the flap usually employed in pneumatic tires. piases a rectangular part 3 of u niform thick- This plug either as a unit or integral with the ness, the end s of which are undercut at 6 to fit flapl is1 formed to permit the passage of the the upstanding end flanges of the usual metalvalve stem therethrough and is recessed on the lic guard 6. This guard is applied over the underside to receive the nut usually employed vlve stem 3 on the outer side of the inner 65 to secuethe metallic wear guard in place. tube 12, the valve stem having the usual in'- The plug of this improvement is a resilient ner integral flange by which it is held on the body having a lower`po'rtion shaped to fit inner side of the inner tube. The rectangumore or less snugly within the metallic guard, lar part 3 of the lower portion 4 of the plug this portion ofthe plugV having its ends in# thus corresponds in length and breadth to the 70 l clined to accommodate the inclined ,end lsimilar maximum length and breadth of the flanges of thelgrard. Laterally of the guard, guard 6. n that is, at right angles to the undercut ends, The guard 6 of course extends longitudithe plug is extended in what will be termed Dall)r of. the lapwhen the parts are in ap-4 side sections, the lower surfaces of which pro plied position, as indicated in Fig. 3, and the 75 ject inthe plane of the bottom of the plug lower portion 4 of theplug is extended in proper with the upper surfaces curved to corboth directions laterally to the guard to prorespond approximately to the curvature of Vide Wings 5', the lower Surfaces of which are the inner surfaces of the beads of the casing on a plane with the lower surface of theporwhen the latter is in place. The plug also tion 4 of the plug and the upper surfaces of so comprises an upper portion of conical formawhich curve from the upper surface of such tion which passes through the valve stein lower portion downwardly and outwardly -to opening in the 'tire rim and acts to seal the mergewith the lower surface. The plug also opening beyond the valve stem. includes an integral upper portion in the The invention is illustrated in the accomlShape of a conical section 4 which extends 85 panving drawings, in which: above the flap, asl indicated in Fig. 2. The

Fig. 1 is a plan viewof the improved sealplugas an entirety is formed with an opening plug, the same being shown integral with ing 5 to permit the passage of the valve stem the Hap. I A therethrough, the lower surface of the part 3 "i" Fig. 2is a transverse section,a portion of of the lower ,portion of the plug being re- 90 the inner tube being shown to illustrate th cessed at 8 to receive the nut I8, which is connection of the valve stem. usually employed to hold the guard in-place.

Fig. 3 is a broken perspective view showing In Figs. 5, 6. and 7, the plug is shown as the improved attachment in operative posiv a unit independent of the flap and the contion in a tire'. A struction is identical with that. previously 95 Fig. 4 is a longitudinal section through the described, except for the fact that the juncsame. ture between the lower portion 4.of the plug AFigli is a plan of the sealing plug shown as and the upper conical portion 4 thereof is rean independent unit. ducedto form a neck 9, designed to receive Fig. 6 is a side elevation of the same. the usual openings formed inthe independent flap and to hold the flap in position below the conical portion of the plug. vo Inapplied position, as indicated in Fig. 3, it will be noted that the plug substantially'tills the space beyond the inner tube and between the beads of the casing throughout the extent of the guard 6 and that the Wings 5 of the plug are, in the ap lication of the tire and the inflation of t e inner tube, bent downwardly so as. to follow to some extent the curvature of the inner tube.

vThe curved -faces of the upper portions of these wings are such as to conform to the curvaturey of the inner surfaces of the casing beads, thus rendering a smooth normal iitting of the parts and a complete filling of the space at this portion of the tire. A conical is formed integral with the iap, it will be arranged approximately between l'the ends of the Hap, so that the iap with the integral plug will tit any size tire. That is tosay, the plug will define that portion of the flap through which the valve tube extends and the ends of the iap will overlap each other at the diametrically opposite portion of the tire. Thus, but one flap is required for any size tire. i

Claims:

1. A sealing plug for pneumatic tires, constructed of resilient material and having a lower portion to lit the guard plate of the inner tube with iexible wings extended laterally of said guard plate, and an upper con; ical portion to seal the valve stem opening in the tire rim beyond such stem. l

2. A tire iap and a sealing plug integral therewith having a body portion below the iap to seat in the metallic guard carried by the inner tube, and an upper portion above the flap to seal the valve stem opening in the tire rim.

3. A tire iap and a sealing plug integral therewith having a body portion below the flap to seat in the metallic guard carried by the inner tube, and an upper portion above the flap to seal the valve stem opening in the tire rim, that portion of the plug below the flap having free iexible wings extended transversely of the flap.

4. A tire iap and a sealing plug integral therewith having a body portion below the flap to seat in the metallic guard carried by the inner tube, and an upper portion above the Hap to seal the valve stem opening in the tire rim, that portion of the plug below the flap having free flexible wings extended 

